65531216 has 20 divisors (see below), whose sum is σ = 127750752. Its totient is φ = 32563296.

The previous prime is 65531203. The next prime is 65531261. The reversal of 65531216 is 61213556.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9956 + ... + 15171.

Almost surely, 2^65531216 is an apocalyptic number.

It is an amenable number.

65531216 is a deficient number, since it is larger than the sum of its proper divisors (62219536).

65531216 is a wasteful number, since it uses less digits than its factorization.

65531216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25298 (or 25292 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 65531216 is about 8095.1353293197. The cubic root of 65531216 is about 403.1649254049.

The spelling of 65531216 in words is "sixty-five million, five hundred thirty-one thousand, two hundred sixteen".